/* Structure commune des pages : barre de navigation, sections, pied de page,
   apparition au défilement. */

/* ---------- Navigation ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; gap: 18px; padding: 18px var(--gutter);
  transition: padding .35s ease;
}
.nav::before {
  content: ''; position: absolute; inset: 0; z-index: -1; opacity: 0; transition: opacity .35s;
  background: rgba(6, 10, 22, .86); border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
}
.nav.scrolled { padding-block: 10px; }
.nav.scrolled::before { opacity: 1; }
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; font-size: .82rem; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; color: var(--pearl); }
.brand svg { width: 30px; height: 30px; color: var(--gold-hi); }
.nav-menu { margin-left: auto; }
.nav-menu ul { display: flex; gap: 2px; margin: 0; padding: 0; list-style: none; }
.nav-menu a {
  position: relative; display: block; padding: 8px 12px;
  font-size: .74rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: rgba(231, 235, 245, .72);
  transition: color .25s;
}
.nav-menu a::after { content: ''; position: absolute; left: 12px; right: 12px; bottom: 2px; height: 2px; background: var(--pearl); transform: scaleX(0); transition: transform .35s var(--ease); }
.nav-menu a:hover, .nav-menu a.active { color: #fff; }
.nav-menu a.active::after, .nav-menu a:hover::after { transform: scaleX(1); }

.sound {
  display: flex; align-items: center; gap: 10px; flex-shrink: 0; min-height: 36px; padding: 0 14px; cursor: pointer;
  background: transparent; border: 1px solid var(--line-strong);
  font-size: .68rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; color: var(--muted);
  transition: border-color .25s, color .25s;
}
.sound:hover, .sound[aria-pressed="true"] { color: #fff; border-color: #fff; }
.eq { display: flex; align-items: flex-end; gap: 2px; height: 12px; }
.eq i { width: 2px; height: 4px; background: currentColor; }
.eq i:nth-child(2) { height: 9px; } .eq i:nth-child(3) { height: 6px; } .eq i:nth-child(4) { height: 11px; }
.sound[aria-pressed="true"] .eq i { animation: eq 1.1s ease-in-out infinite; }
.sound[aria-pressed="true"] .eq i:nth-child(2) { animation-delay: -.3s; }
.sound[aria-pressed="true"] .eq i:nth-child(3) { animation-delay: -.6s; }
.sound[aria-pressed="true"] .eq i:nth-child(4) { animation-delay: -.9s; }

.burger { display: none; position: relative; z-index: 2; width: 42px; height: 42px; padding: 0; cursor: pointer; background: transparent; border: 1px solid var(--line-strong); }
.burger i { position: absolute; left: 11px; right: 11px; height: 1.5px; background: #fff; transition: transform .35s var(--ease), opacity .25s; }
.burger i:nth-child(1) { top: 14px; } .burger i:nth-child(2) { top: 20px; } .burger i:nth-child(3) { top: 26px; }
.nav.open .burger i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav.open .burger i:nth-child(2) { opacity: 0; }
.nav.open .burger i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Sections ---------- */
.section { position: relative; padding: clamp(80px, 10vw, 140px) var(--gutter); }
.container { position: relative; max-width: 1280px; margin: 0 auto; }
.sec-head { max-width: 780px; margin: 0 0 clamp(40px, 5vw, 64px); }
.sec-title {
  margin: 12px 0 14px; font-size: clamp(2rem, 4.4vw, 3.4rem); font-weight: 700; line-height: 1.05;
  letter-spacing: -.005em; text-transform: uppercase; color: var(--pearl); text-wrap: balance;
}
.sec-sub { margin: 0; font-size: 1.05rem; line-height: 1.7; color: var(--muted); }
.sec-head.left { margin-bottom: 22px; }

.js .reveal { opacity: 0; transform: translateY(28px); transition: opacity .9s ease, transform .9s var(--ease); transition-delay: var(--d, 0s); }
.js .reveal.in { opacity: 1; transform: none; }

/* ---------- Pied de page ---------- */
.footer { padding: 80px var(--gutter) 46px; border-top: 1px solid var(--line); background: linear-gradient(180deg, var(--night), #04070f); }
.footer-inner { display: grid; justify-items: center; gap: 18px; text-align: center; }
.footer-crest { width: 44px; height: 44px; color: var(--gold-hi); }
.f-title { margin: 0; font-size: 1rem; font-weight: 700; letter-spacing: .24em; text-transform: uppercase; color: var(--pearl); }
.footer-nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 22px; }
.footer-nav a { font-size: .72rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--faint); transition: color .25s; }
.footer-nav a:hover { color: #fff; }
.legal { max-width: 760px; margin: 8px 0 0; font-size: .76rem; line-height: 1.7; color: var(--faint); }

/* ---------- Adaptatif ---------- */
@media (max-width: 1320px) { .nav-menu a { padding: 8px 7px; letter-spacing: .08em; font-size: .7rem; } }
@media (max-width: 1200px) and (min-width: 1021px) { .brand span { display: none; } }
@media (max-width: 1020px) {
  .burger { display: block; }
  .nav-menu + .burger { margin-left: auto; }
  .nav-menu {
    position: fixed; top: 0; right: 0; bottom: 0; width: min(320px, 86vw); padding: 96px 28px 40px;
    background: rgba(6, 10, 22, .97); border-left: 1px solid var(--line);
    transform: translateX(100%); visibility: hidden; transition: transform .5s var(--ease), visibility .5s;
  }
  .nav.open .nav-menu { transform: none; visibility: visible; }
  .nav-menu ul { flex-direction: column; gap: 4px; }
  .nav-menu a { padding: 12px 0; font-size: .9rem; letter-spacing: .14em; }
  .nav-menu a::after { left: 0; right: auto; width: 40px; }
  .sound { margin-left: auto; }
}
@media (max-width: 680px) {
  .sound-label { display: none; }
  .brand span { font-size: .72rem; letter-spacing: .14em; }
}